A quick look at U.S. military involvement in Africa

U.S. quietly positioning itself as a force in Africa

Using a blend of drones, Special Operations Forces and proxy soldiers, the U.S. has rapidly, but quietly escalated its foothold in Africa to fight what it claims to be a growing security threat. Critics question U.S. motives, citing oil and China as the true targets.

13. NIGERIA

- U.S. troops are in Nigeria to help fight Boko Haram and to provide training in Africa's most populous country.